RE: Loss of Telnet Capability to 6509

["Jason Frisvold" <friz () corp ptd net>]

Do you have ACL's restricting access to the vty's?  I've seen instances where telnet ports get locked up because of 
port scanning and/or attacks...

--
Jason Frisvold
Penteledata


> -----Original Message-----
> From: Richard J. Sears [mailto:rsears () adnc com] 
> Sent: Wednesday, July 28, 2004 2:54 PM
> To: Nanog
> Subject: Loss of Telnet Capability to 6509
>
>
>
> We posted this to cisco-nsp but someone suggested posting it here as
> well...
>
>
>
> We have a 6509 running a SUP720 in IOS only mode (no cat os). 
>
> At around 4am this morning, we lost our ability to telnet to 
> the router.
> Running a tcpdump shows that the router never responds to the telnet
> request. 
>
> All functions and interfaces on the router seem fine (bgp, 
> etherchannel,
> ibgp, vtp, hsrp) and I can console into the sup with no 
> problems at all,
> we just cannot telnet into it. The CPU is at around 6%.
>
> I have checked all access lists on the router, none were added/removed
> or modified on line vty that would cause this problem. All logging
> appears normal.
>
> We are running Version 12.2(17a)SX3.
>
> Anyone have a similar problem or know how to check or restart 
> the telnet
> process on the router without a reload...?
>
>
> ******************************************
> Richard J. Sears
> Vice President         
> American Digital Network                          
> ----------------------------------------------------
> rsears () adnc com
> http://www.adnc.com
> ----------------------------------------------------
> 858.576.4272 - Phone
> 858.427.2401 - Fax
> INOC-DBA - 6130
> ----------------------------------------------------
>
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>
>
> "Work like you don't need the money, love like you've
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